This cache is not at the posted coordinates, but this hill marks the apex of the national triangle - part of the geometric foundation for Canberra’s design - you will learn more about in the associated Adventure Lab.
The get the coordinates for this cache you need to download the Geocaching Adventure Lab app for your phone. When you open the app it will display the closest adventures. You will need to choose the "Looking at Canberra" Adventure Lab cache. The Adventure Lab Caches are like Mega Event Lab Caches in that you will receive one Lab Cache Find at each location!
The "Looking at Canberra" Adventure Lab will take you to different vantage points of our capital. Looking from the hilltops and at the displays in the Capital Exhibition will reveal the large scale planning that was conducted for the city— how government, military, business districts and housing suburbs are placed within the former Limestone Plains landscape according to Griffin's grand plan for the new nation's capital 100 years ago.
This Adventure will take you to 5 locations - each location will require a question to be answered to get the Lab Cache Find. You can do as many or as few of the 5 locations of the "Looking at Canberra" Adventure as you want and you can do them in any order you want. At some locations you will receive coordinates for bonus mystery caches when you answer the question. Like the coordinates for this cache, then you need to go and sign the logbook as per usual to claim the cache find.
Enjoy the views and history along these places that follow Canberra Tracks #3.
Be stealth and use the hint as this is a high security and busy area.
FTF: Pprime (P`)